/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.zookeeper.test;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.ZooKeeper.States;
import org.junit.Assert;
import org.junit.Test;

public class ClientRetry extends ClientBase {

	@Override
	public void setUp() throws Exception {
		maxCnxns = 1;
		super.setUp();
	}

	/*
	 * This is a simple test - try to connect two clients to a server accepting a
	 * maximum of one connection from each address. Check that only one is accepted.
	 * Close that connection, and check that the other eventually connects.
	 *
	 * There is a possibility of a false positive here, as when zk2 is tested for
	 * having connected it might not have been given enough time, and finish
	 * connecting after the test is done. Since the server doesn't tell the client
	 * why it hasn't connected, there's no obvious way to detect the difference.
	 */
	@Test
	public void testClientRetry() throws IOException, InterruptedException, TimeoutException {
		CountdownWatcher cdw1 = new CountdownWatcher();
		CountdownWatcher cdw2 = new CountdownWatcher();
		ZooKeeper zk = new ZooKeeper(hostPort, 10000, cdw1);
		try {
			cdw1.waitForConnected(CONNECTION_TIMEOUT);
			ZooKeeper zk2 = new ZooKeeper(hostPort, 10000, cdw2);
			try {
				States s1 = zk.getState();
				States s2 = zk2.getState();
				Assert.assertSame(s1, States.CONNECTED);
				Assert.assertSame(s2, States.CONNECTING);
				cdw1.reset();
				cdw1.waitForDisconnected(CONNECTION_TIMEOUT);
				cdw2.waitForConnected(CONNECTION_TIMEOUT);
				Assert.assertSame(zk2.getState(), States.CONNECTED);
			} finally {
				zk2.close();
			}
		} finally {
			zk.close();
		}
	}
}
